Explain
different windows form controls in VB.Net
VB.Net
contains a very rich amount of the controls for the windows
application.
Every
controls have three important elements which are Properties and
Events
Properties
means all the controls can resized, customized and moved. A property
is a value or characteristics held by the particular control.
An
Event means a signal that informs an application that something
important has occurred.
Some
of the common Properties, Method and Events of all controls are as
below.
Common
Properties of all controls which are listed below:
Property Name
|
Description
|
Text
|
Display the name of the control on the windows
forms
|
Name
|
Contains the name of the controls by which the
control can be identified
|
Minimum Size
|
With the help of the this property we can
manage the minimum size of the control
|
Maximum Size
|
With the help of the this property we can
manage the maximum size of the control
|
Size
|
With the help of the this property we can
manage the size of the control
|
Modifier
|
To handle the access level of control public,
private, protected or friend
|
Font
|
To set the font style of that control
|
TabIndex
|
To set the tab index of the particular control
|
Visible
|
Control should be visible or not visible we can
set with this property
|
Common
Events of all controls which are listed:
Event Name
|
Description
|
Click
|
When we click on the control and we have to
execute any code that code will be written in this event
|
MouseClick
|
When mouse will be clicked on the control and
we have to execute any code that code will be written in this
event
|
DoubleClick
|
When we double click on the control and we have
to execute any code that code will be written in this event
|
DragLeave
|
When we remove the mouse from the control and
at that time if any code have to be executed that code will be
written in this event
|
SizeChanged
|
When we changed the size of the control and at
that time if any code have to be
executed that code will be written in this
event
|
1.
Form Control
The
container for all the controls that make up the user interface.
Properties:
Property Name
|
Description
|
StartPosition
|
This property determines the initial position
of the form when it's first
displayed.
|
MinimizeBox
|
By default, this property is True and you can
set it to False to hide the
Minimize button on the title bar.
|
MaximizeBox
|
By default, this property is True and you can
set it to False to hide the
Maximize button on the title bar.
|
ControlBox
|
By default, this property is True and you can
set it to False to hide the
Minimize, Maximize and close button on the
title bar.
|
IsMDIContainer
|
By default, this property is False and you can
set it to True for generating
MDI application.
|
Events:
Event Name
|
Description
|
Load
|
Occurs when the form is loaded for the first
time.
|
Closed
|
Occurs before the form is closed.
|
Closing
|
Occurs when the form is closing
|
HelpButtonClicked
|
Occurs when the Help button is clicked.
|
2.
Button Control
It
represents a Windows button control.
Properties:
Property Name
|
Description
|
BackColor
|
Gets or sets the background color of the
control.
|
DialogResult
|
Gets or sets a value that is returned to the
parent form when the button is
clicked. This is used while creating dialog
boxes.
|
Image
|
Gets or sets the image that is displayed on a
button control.
|
Font
|
Sets the font.
|
Size
|
Sets the size.
|
Enable
|
By default, this property is True and you can
set it to False to disable the
working of button.
|
Events:
Event Name
|
Description
|
GotFocus
|
Occurs when the control receives focus.
|
TextChanged
|
Occurs when the Text property value changes.
|
Validated
|
Occurs when the control is finished validating.
|
Click
|
Occurs when user clicks the Button.
|
FontChange
|
Occurs when font is changed.
|
3.
Label Control
It
represents a standard Windows label.
Properties:
Property Name
|
Description
|
Autosize
|
Gets or sets a value specifying if the control
should be automatically
resized to display all its contents.
|
BorderStyle
|
Gets or sets the border style for the control.
|
Text
|
Used to Display the text.
|
TextAlign
|
Gets or sets the alignment of text in the
label.
|
Events:
Event Name
|
Description
|
Leave
|
Occurs when the input focus leaves the control.
|
LostFocus
|
Occurs when the control loses focus.
|
TextChanged
|
Occurs when the Text property value changes.
|
4.
TextBox Control
It
represents a Windows text box control.
Properties:
Property Name
|
Description
|
CharacterCasing
|
Gets or sets whether the TextBox control
modifies the case of characters
as they are typed.
|
Multiline
|
Gets or sets a value indicating whether this is
a multiline TextBox control.
|
PasswordChar
|
Gets or sets the character used to mask
characters of a password in a
single-line TextBox control.
|
Readonly
|
By default, this property is True and you can
set it to False to make the
text Readonly.
|
Visible
|
By default, this property is True and you can
set it to False to make the
Textbox invisible.
|
Events:
Event Name
|
Description
|
TextAlignChanged
|
Occurs when the TextAlign property value
changes.
|
TextChanged
|
Occurs when the text in the textbox changes.
|
5.
RadioButton Control
It
enables the user to select a single option from a group of choices
when paired with other RadioButton controls.
Properties:
Property Name
|
Description
|
CheckAlign
|
Gets or sets the location of the check box
portion of the radio button.
|
Checked
|
Gets or sets a value indicating whether the
control is checked.
|
Events:
Event Name
|
Description
|
AppearanceChanged
|
Occurs when the value of the Appearance
property of the RadioButton
control is changed.
|
CheckedChanged
|
Occurs when the value of the Checked property
of the RadioButton control
is changed.
|
6.
Checkbox Control
It
represents a Windows CheckBox.
Properties:
Property Name
|
Description
|
CheckAlign
|
Gets or sets the horizontal and vertical
alignment of the check mark on the
check box.
|
Checked
|
Gets or sets a value indicating whether the
check box is selected.
|
ThreeState
|
Gets or sets a value indicating whether or not
a check box should allow three check states rather than two.
|
Events:
Event Name
|
Description
|
AppearanceChanged
|
Occurs when the value of the Appearance
property of the check box is
changed.
|
CheckedChanged
|
Occurs when the value of the Checked property
of the CheckBox control is
changed.
|
CheckStateChanged
|
Occurs when the value of the CheckState
property of the CheckBox control is changed.
|
7.
ComboBox Control
It
represents a Windows combo box control.
Properties:
Property Name
|
Description
|
DataBindings
|
Gets the data bindings for the control.
|
DataSource
|
Gets or sets the data source for this ComboBox.
|
DropDownStyle
|
Gets or sets a value specifying the style of
the combo box.
|
Items
|
Add the items to be displayed.
|
Events:
Event Name
|
Description
|
DropDown
|
Occurs when the drop-down portion of a combo
box is displayed.
|
DropDownClosed
|
Occurs when the drop-down portion of a combo
box is no longer visible.
|
SelectedIndexChanged
|
Occurs when the SelectedIndex property of a
ComboBoxhas changed.
|
8.
ListView Control
It
represents a Windows list view control, which displays a collection
of items that can be displayed using one of four different views.
Properties:
Property Name
|
Description
|
Columns
|
Gets the collection of all column headers that
appear in the control.
|
HeaderStyle
|
Gets or sets the column header style.
|
Items
|
Gets a collection containing all items in the
control.
|
Events:
Event Name
|
Description
|
ItemCheck
|
Occurs when an item in the control is checked
or unchecked.
|
ColumnClick
|
Occurs when a column header is clicked.
|
SelectedIndexChanged
|
Occurs when the selected index is changed.
|
